Python 网络编程之UDP

（1）服务器端

from socket import *

from time import ctime

HOST = '';

PORT = 21546

BUFSIZE = 1024

ADDR = (HOST, PORT)

udpSerSock = socket(AF_INET, SOCK_DGRAM)

udpSerSock.bind(ADDR)

while True:

print('waiting for message...')

data, addr = udpSerSock.recvfrom(BUFSIZE)

udpSerSock.sendto(('[%s] %s' %(ctime(), data.decode())).encode(), addr)

print('...received from and returned to:', addr)

udpSerSock.close()

（2）客户端

from socket import *

HOST = '127.0.0.1'

PORT = 21567

BUFSIZE = 1024

ADDR = (HOST, PORT)

while True:

tcpCliSock = socket(AF_INET, SOCK_STREAM)

tcpCliSock.connect(ADDR)

data = input('> ')

if not data:

break

tcpCliSock.send(('%s\r\n' % data).encode())

data = tcpCliSock.recv(BUFSIZE).decode()

if not data:

break

print(data.strip())

tcpCliSock.close()